ok a small howto:
A) use x264gui, which is available here (http://forum.doom9.org/showthread.php?t=95415)
it doesnt offer all options as the vfw gui, but it allows you to output directly to .mp4 and also offers anamorphic resize
B) if you want to use the full power of the commandline encoder you have to feed it with commandlines that way:
1) create a .txt file and place it in the same folder as x264.exe and your source .avs
2) write down a commandline in the .txt which looks for example like this:
x264 --pass 1 --bitrate 700 --bframe 3 --b-pyramid --ref 5 --filter -5:-5 --analyse all --8x8dct --weightb --progress -o NUL input.avs
x264 --pass 2 --bitrate 700 --bframe 3 --b-pyramid --ref 5 --filter -5:-5 --analyse all --8x8dct --weightb --progress -o output.mp4 input.avs this is for a 2pass encode which uses 3 b-frames max, b-pyramid, 5 reference frames, loop, cabac, weighted biprediction and i8x8 of high profile
the currently available commandline switches are the following (but you dont need to set most of them anyways):
Options:
-h, --help Print this help
Frame-type options:
-I, --keyint <integer> Maximum GOP size [250]
-i, --min-keyint <integer> Minimum GOP size [25]
--scenecut <integer> How aggressively to insert extra I-frames [40]
-b, --bframes <integer> Number of B-frames between I and P [0]
--no-b-adapt Disable adaptive B-frame decision
--b-bias <integer> Influences how often B-frames are used [0]
--b-pyramid Keep some B-frames as references
--no-cabac Disable CABAC
-r, --ref <integer> Number of reference frames [1]
--nf Disable loop filter
-f, --filter <alpha:beta> Loop filter AlphaC0 and Beta parameters [0:0]
Ratecontrol:
-q, --qp <integer> Set QP [26]
-B, --bitrate <integer> Set bitrate
--qpmin <integer> Set min QP [10]
--qpmax <integer> Set max QP [51]
--qpstep <integer> Set max QP step [4]
--ratetol <float> Allowed variance of average bitrate [1.0]
--vbv-maxrate <integer> Max local bitrate [0]
--vbv-bufsize <integer> Size of VBV buffer [0]
--vbv-init <float> Initial VBV buffer occupancy [0.9]
--ipratio <float> QP factor between I and P [1.40]
--pbratio <float> QP factor between P and B [1.30]
--chroma-qp-offset <integer> QP difference between chroma and luma [0]
-p, --pass <1|2|3> Enable multipass ratecontrol:
- 1: First pass, creates stats file
- 2: Last pass, does not overwrite stats file
- 3: Nth pass, overwrites stats file
--stats <string> Filename for 2 pass stats ["x264_2pass.log"]
--rceq <string> Ratecontrol equation ["blurCplx^(1-qComp)"]
--qcomp <float> QP curve compression: 0.0 => CBR, 1.0 => CQP [0.60]
--cplxblur <float> Reduce fluctuations in QP (before curve compression) [20.0]
--qblur <float> Reduce fluctuations in QP (after curve compression) [0.5]
--zones <zone0>/<zone1>/...
Tweak the bitrate of some regions of the video
Each zone is of the form
<start frame>,<end frame>,<option>
where <option> is either
q=<integer> (force QP)
or b=<float> (bitrate multiplier)
Analysis:
-A, --analyse <string> Partitions to consider ["p8x8,b8x8,i8x8,i4x4"]
- p8x8, p4x4, b8x8, i8x8, i4x4
- none, all
(p4x4 requires p8x8. i8x8 requires --8x8dct.)
--direct <string> Direct MV prediction mode ["temporal"]
- none, spatial, temporal
-w, --weightb Weighted prediction for B-frames
--me <string> Integer pixel motion estimation method ["hex"]
- dia: diamond search, radius 1 (fast)
- hex: hexagonal search, radius 2
- umh: uneven multi-hexagon search
- esa: exhaustive search (slow)
--merange <integer> Maximum motion vector search range [16]
-m, --subme <integer> Subpixel motion estimation quality: 1=fast, 5=best. [5]
--no-chroma-me Ignore chroma in motion estimation
-8, --8x8dct Adaptive spatial transform size
Input/Output:
--level <integer> Specify level (as defined by Annex A)
--sar width:height Specify Sample Aspect Ratio
--fps <float|rational> Specify framerate
--seek <integer> First frame to encode
--frames <integer> Maximum number of frames to encode
-o, --output Specify output file
--threads <integer> Parallel encoding (uses slices)
--no-asm Disable all CPU optimizations
--no-psnr Disable PSNR computation
--quiet Quiet Mode
-v, --verbose Print stats for each frame
--progress Show a progress indicator while encoding
--visualize Show MB types overlayed on the encoded video
--aud Use access unit delimiters
3) after you have written down your commandline in the .txt, rename the .txt extension to .bat
4) doubleclick on the .bat file to execute it and start the twopass encode
thats it ;)